Abstract: A signal output circuit is used for an IC-patterned image sensor, including, at its signal processing part, source-follower amplifiers for converting a high impedance image signal to a low impedance image signal. To eliminate offset voltages of the amplifiers, an amplifier for converting the impedance of the image signal is disposed in parallel to an amplifier for converting an impedance of a reference voltage. A differential amplifier is used to calculate a difference between the foregoing two amplifiers. The signal output circuit includes a trimming circuit to adjust an offset voltage of these amplifiers.

Abstract: An LED array in which the optical output distribution in each light emitting region is as uniform as possible. An n electrode 3 is provided on the under surface of a substrate 2 and a p electrode is provided on the upper surface thereof. A multiplicity of light emitting regions 4 are formed on the upper layer of the substrate 2. Two strip-like conductor portions 6c extending over each light emitting region 4 in ohmic contact are connected to each electrode 6 so that a current is efficiently applied to the conductor portions 6c of each light emitting region 4 and the optical output distribution in each light emitting region 4 is made uniform.

Abstract: The spots to be bonded are determined by a light intensity controller as data and bonding is carried out in accordance with the data. The data obtained are stored in a memory or disk memory. In the case of storing the data in the memory, the data is transmitted to a wire bonder as occasion demands, and the wire bonder carries out bonding in accordance with the received data. In the case of storing the data in the disk memory, the disk memory is mounted on the wire bonder. The wire bonder reads out the data from the disk memory as occasion demands and carries out wire bonding.

Abstract: An image sensor includes a frame 1, a light source unit 4 located in the frame 1 for irradiating light onto an original A to be read, a light receiving sensor 5 located in the frame 1 and including a plurality of light receiving portions arranged therein, and an optical system 6 located in the frame 1 for causing the light from the original A to be received by the light receiving portions in the light receiving sensor. The image sensor also includes at least one positioning portion formed in the frame 1 at an appropriate location and used to mount the light receiving sensor substrate 3 in the frame 1 and a stopper engaging and receiving portion 12 formed in the frame at an appropriate location. A leaf spring 2 has a stopper 21 formed thereon for detachably engaging the stopper engaging and receiving portion. The light receiving sensor substrate 3 properly positioned in the frame relative to the positioning portion 11 is resiliently biased against the frame.

Abstract: An LED light source with readily adjustable luminous energy including LED chips is disclosed. A resistor device is provided in order to control the current flowing in LED chips for reducing variance of luminous energy. The resistor device includes a plurality of resistors arranged in parallel, and a plurality of fuses connected in series with the respective resistors. In order to obtain the desired resistance value of the resistor device, the fuses connected to unnecessary resistors in series are burnt out by applying an excess current to the fuses thereby omitting a bonding process of the resistors or the like.

Abstract: An apparatus for optically writing information comprises a row of longitudinally spaced LED array chips, a photosensitive surface arranged to face the chip row in parallel thereto, and a lens system arranged between the chip row and the photosensitive surface. Each array chip has constantly spaced LEDs to provide luminescent dots. The lens system includes convex lens elements arranged in corresponding relation to the respective array chips to form magnified images, in inverted arrangement, of the luminescent dots of the respective array chips on the photosensitive surface, so that all of the dot images on the photosensitive surface are constantly spaced.